[noodly]

Not me. It boils down to the meaning of universe - if you define it as everything, nothing outside it exists, as there's no outside, in particular there can't be any machine, that simulates the universe, otherwise we wouldn't call it universe. If you define universe as computable subset of everything we have access to, it might be possible to simulate that universe, using computing machine if this machine had access to enough resources outside that universe to hold its state.